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Abstract |
In the context of photonic quantum information science, the 2D material hexagonal boron nitride (hBN) has emerged as a very promising material, allowing realisation of compact heterostructures and integrated photonic devices. Moreover, this wide-gap material hosts single-photon emitters with advantageous optical properties. However, these deep defects initially suffered from random emission wavelength and spatial location, thereby limiting their scalability for practical applications.
We have recently demonstrated a technique to generate quantum emitters in hBN with controlled position and wavelength. The emitters are locally activated in exfoliated hBN single crystals using a focused electron beam, opening the way for top-down integration in nanostructures. They exhibit bright and narrow lines with high optical coherence and low ensemble distribution. I will present their fabrication technique, their optical properties and coherent control, as well as a two-photon interference experiment to evaluate their indistinguishability. I will also show recent results of deterministic integration into photonic structures. Altogether, the controlled generation of coherent quantum emitters in 2D materials open appealing perspectives in quantum photonics. |
